28 Nov
2006
28 Nov
'06
1:50 p.m.
On 28 Nov 2006 at 12:35, Chris M wrote:
ok, enough of you dudes seem to be familiar with the
stuff, how does it compare with Brasso?
One of my hobbies is repairing and rebuilding brass musical wind
instruments (trumpets, horns, tubas, etc.)--and the mention of Brasso
causes me to cringe. Basically it's an abrasive in a mixture of
stoddard solvent and ammonia. The problem is that the abrasive is
far to aggressive. Sometimes I'll get old horns that have had the
engraving almost obliterated by overuse of Brasso.
Consider that the gold plating on an edge connector is only a few
microns thick and that gold is much softer than brass.
On old PCBs, I've had pretty good success with just a toothbrush and
a mild detergent in warm water. Follow up with a deionized water
rinse followed by ethyl alcohol as a drier. In severe cases, a
buffing compound, such as rouge, applied with a cotton buff on a
Dremel should clean things right up.
Cheers,
Chuck